What's a "standard" drink?

Many people are surprised to learn what counts as a “standard” drink. In the United States, a standard drink is any drink that contains about 0.6 fluid ounces or 14 grams of pure alcohol (also known as an alcoholic drink-equivalent). Although the drinks pictured here are different sizes, each contains approximately the same amount of alcohol and counts as one U.S. standard drink or one alcoholic drink-equivalent.

2-3 oz of cordial, liqueur, or aperitif(2.5 oz shown)

1.5 oz of brandy(a single jigger or shot)

Each beverage portrayed above represents one U.S. standard drink (also known as an alcoholic drink-equivalent). The percent of pure alcohol, expressed here as alcohol by volume (alc/vol), varies within and across beverage types.

The examples above serve as a starting point for comparison. For different types of beer, wine, or malt liquor, the alcohol content can vary greatly. Some differences are smaller than you might expect, however. Many light beers, for example, have almost as much alcohol as regular beer—about 85 percent as much, or 4.2 percent versus 5.0 percent alcohol by volume (alc/vol), on average.

If you want to know the alcohol content of a canned or bottled beverage, start by checking the label. Not all beverages are required to list the alcohol content, so you may need to search online for a reliable source of information, such as the bottler's Web site. For fact sheets about how to read wine, malt beverage, and distilled spirits labels, visit the consumer corner of the U.S. Alcohol and Tobacco Tax and Trade Bureau.

Although the U.S. standard drink (alcoholic drink-equivalent amounts) are helpful for following health guidelines, they may not reflect customary serving sizes. In addition, while the alcohol concentrations listed are "typical," there is considerable variability in alcohol content within each type of beverage (e.g., beer, wine, distilled spirits). If you want to know how much alcohol is in a cocktail or a beverage container, try one of our calculators.

How many "drinks" are in a bottle of wine?

A typical 25-ounce (750 ml) bottle of table wine holds about 5 "standard" drinks, each containing about 5 ounces. This serving size of wine contains about the same amount of alcohol as a 12-ounce regular beer or 1.5 ounces of 80-proof spirits.

Get to know what 5 ounces looks like by measuring it out at home. That way you can estimate how many standard drinks you're being served in a restaurant or bar that uses large glasses and generous serving sizes.

Mixing alcohol with certain medications can cause nausea, headaches, drowsiness, fainting, a loss of coordination, internal bleeding, heart problems, and difficulties in breathing. Alcohol can also make a medication less effective. For more information, see Harmful Interactions: Mixing Alcohol with Medicines.

Each year, an estimated 5,000 people under age 21 die from alcohol-related injuries.

The younger people are when they start to drink, the more likely they are to develop alcohol use disorder at some point in their lives.

Underage drinking is illegal—an arrest can lead to losing a job, a driver's license, or a college scholarship.

Even moderate amounts of alcohol can significantly impair driving performance and your ability to operate other machinery, whether or not you feel the effects of alcohol.

Heavy drinking during pregnancy can cause brain damage and other serious problems in the baby. Because it is not yet known whether any amount of alcohol is safe for a developing baby, women who are pregnant or may become pregnant should not drink.

Highest risk

About 50% of people who drink in this group have alcohol use disorder.

Increased risk

This "increased risk" category contains three different drinking pattern groups. Overall, nearly 20% of people who drink in this category have alcohol use disorder.

Low-risk drinking

Only about 2% of drinkers in this group has alcohol use disorder.

A U.S. standard drink contains about 0.6 fluid ounces or 14 grams of pure alcohol (also known as an alcoholic drink-equivalent). That's the amount in 12 ounces of regular beer, 5 ounces of table wine, or 1.5 ounces of 80-proof distilled spirits.

Distilled spirits include vodka, whiskey, gin, rum, and tequila.

Light to moderate drinking

Men: Up to 2 drinks per day

Women: Up to 1 drink per day

Heavy or at-risk drinking

Men: More than 4 drinks on any day or more than 14 drinks per week

Women: More than 3 drinks on any day or more than 7 drinks per week

Low-risk drinking

Men: No more than 4 drinks on any day and no more than 14 per week

Women: No more than 3 drinks on any day and no more than 7 per week

People with a parent, grandparent, or other close relative with alcoholism have a higher risk for becoming dependent on alcohol. For many, it may be difficult to maintain low-risk drinking habits.

Pace yourself: It's best to have no more than one standard drink per hour, with nonalcoholic "drink spacers" between alcohol beverages. On any day, stay within low-risk levels of no more than 4 drinks for men or 3 for women. Note that it takes about 2 hours for the adult body to completely break down a single drink. Do not drive after drinking.